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Configuring the Voice Settings
SIP
Cisco SPA232D Administration Guide 66
4
SIP Timer Values
RFC 2543 Call
Hold
Configures the type of call hold: a:sendonly or 0.0.0.0. Do
not use the 0.0.0.0 syntax in a HOLD SDP; use the
a:sendonly syntax.
Default setting: no
Mark all AVT
Packets
Select yes if you want all AVT tone packets (encoded for
redundancy) to have the marker bit set for each DTMF
event. Select no to have the marker bit set only for the first
packet.
Default setting: yes
SIP TCP Port Min The lowest TCP port number that can be used for SIP
sessions.
Default setting: 5060
SIP TCP Port Max The highest TCP port number that can be used for SIP
sessions.
Default setting: 5080
CTI Enable Enables or disables the Computer Telephone Interface
feature provided by some servers.
Default setting: no
Field Description
SIP T1 RFC 3261 T1 value (round-trip time estimate), which can
range from 0 to 64 seconds.
Default setting: 0.5
SIP T2 RFC 3261 T2 value (maximum retransmit interval for non-
INVITE requests and INVITE responses), which can range
from 0 to 64 seconds.
Default setting: 4
SIP T4 RFC 3261 T4 value (maximum duration a message remains
in the network), which can range from 0 to 64 seconds.
Default setting: 5
SIP Timer B INVITE time-out value, which can range from 0 to 64
seconds.
Default setting: 32
Field Description